Bike frame



FIG. 1 is a top, rear, and left side perspective view of a bike frame showing our new design;

FIG. 2 is a left side elevational view thereof

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a front elevational view thereof

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in the drawings illustrate portions of the bike frame and environmental structures that form no part of the claimed design. 

CLAIM We claim the ornamental design for a bike frame, as shown and described. 